LandOfFree - US Patents - Listing for Wells,Valves, closures or changeable restrictors

Wells – Valves – closures or changeable restrictors – Destructible element

Packer deflate subassembly for an inflatable packer system

Wells – Valves – closures or changeable restrictors

Packing assembly for wellheads

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Pass through valve and stab tool

Wells – Valves – closures or changeable restrictors – Destructible element

PDF valve

Wells – Valves – closures or changeable restrictors – Operated by dropped element

PDF valve

Wells – Valves – closures or changeable restrictors

Pipe snubbing method and apparatus

Wells – Valves – closures or changeable restrictors – Fluid operated

Piston actuated well safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Piston actuated well safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Piston sleeve valve for use with oilfield fishing operations

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Plug catcher tool

Wells – Valves – closures or changeable restrictors – Destructible element

Plug for operating a downhole device using tubing pressure

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Polished bore receptacle

Wells – Valves – closures or changeable restrictors – Fluid operated

Poppet valve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Port apparatus for well piping

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Port collar assembly for use in a wellbore

Wells – Valves – closures or changeable restrictors – Fluid operated

Positional control of downhole actuators

Wells – Valves – closures or changeable restrictors – Fluid operated

Positive seal float collar

Wells – Valves – closures or changeable restrictors – Fluid operated

Pressure actuated downhole tool

Wells – Valves – closures or changeable restrictors – Fluid operated

Pressure balanced valve